Frame number detecting device

• Main Author: KIZU NAOKI
• Format: Patent
• Language: English
• Published: 17.05.2005
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

An object is to provide a frame number detecting device having a frame counter which is less apt to output a wrong frame number even if a sync signal type was erroneously detected from a DVD etc. and the combination of variation of the sync signal types corresponds to an existing frame number. A sync number encoding portion ( 6 ) specifies a read frame number and provides it as an output. First and second frame counters ( 7 ) and ( 13 ) run by themselves and output their count numbers. A state detecting counter ( 9 ) causes a state variable to go up/down according to whether a signal (S 5 ) and a signal (S 7 ) agree with each other. When the state variable is at its lowest value and the sync number encoding portion ( 6 ) was able to specify the frame number, the signal (S 5 ) is reflected in the signal (S 7 ). When the state variable has reached its highest value, the signal (S 7 ) is reflected in a signal (S 13 ).